Is bleeding from an anal fissure serious?

Nov 14, 2025 Source: Cainiu Health

Dr. Li Jingxiang

Introduction

If anal fissure bleeding occurs only during defecation, with a small amount of bright red blood adhering to the stool surface or dripping onto toilet paper, and the bleeding stops spontaneously after bowel movement without associated symptoms such as dizziness or fatigue, this situation is usually caused by friction from dry stool irritating the wound. By adjusting diet and maintaining soft stools, the bleeding symptoms will gradually improve and are generally not considered serious.

Generally, anal fissure bleeding is not considered serious if it is minimal, occurs occasionally, and stops on its own. However, if the bleeding is heavy, continuous, or accompanied by symptoms of anemia, it is more severe. If in doubt, it is advisable to seek medical consultation promptly. Detailed analysis is as follows:

If bleeding from an anal fissure only occurs during bowel movements, with a small amount of bright red blood appearing on the stool surface or on toilet paper, and stops spontaneously after defecation without associated symptoms such as dizziness or fatigue, this is usually caused by irritation of the fissure due to dry stools. By adjusting diet and maintaining soft bowel movements, the bleeding typically improves gradually and is generally not considered serious.

If the bleeding is heavy, with persistent dripping or even jet-like hemorrhage during bowel movements that does not stop on its own, or if symptoms of anemia such as dizziness, pallor, and fatigue develop after prolonged or recurrent bleeding, the condition may be more serious. This could result from a large wound, deeper vascular injury, or infection due to chronic non-healing fissures. Without timely intervention, anemia may worsen or the condition may deteriorate, indicating a more severe situation.

After experiencing anal fissure bleeding, closely monitor the amount of blood loss and your overall physical condition, and avoid straining during bowel movements. If bleeding persists or is accompanied by discomfort, prompt medical attention is recommended to prevent worsening of the condition due to delayed treatment.

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Can constipation and anal fissures heal on their own?

In general, whether constipation-related anal fissures can heal spontaneously mainly depends on the type and severity of the fissure. After developing an anal fissure, it is important to first determine its type rather than blindly waiting for self-healing. In daily life, avoid prolonged sitting to reduce pressure around the anus; avoid prolonged squatting during bowel movements and keep bowel movements brief. If the anal fissure persists for more than two weeks without healing, or if symptoms such as increased pain or heavier bleeding occur, prompt medical attention is necessary.

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Can patients with anal fissures run?

In general, whether patients with anal fissures can run depends on the severity of their condition and overall physical health. If there is obvious discomfort or worsening symptoms, prompt medical attention is recommended. Before running, individuals should assess their symptoms to determine the current stage of the condition. Wear loose, breathable clothing to minimize friction around the anus, and clean the anal area promptly after running to keep the area dry.

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How to quickly relieve pain from anal fissures

Pain from anal fissures can be relieved with topical analgesic ointments, warm sitz baths, adjusting bowel habits, using lubricants, and avoiding irritation to the affected area. These measures can quickly alleviate pain and reduce further damage to the fissure site. If pain continues to worsen, bleeding increases, or signs of infection appear, prompt medical attention is recommended. Use ointments containing ingredients such as lidocaine under a doctor's guidance.

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How to treat pain from anal fissures

Treatment methods for anal fissure pain include warm water sitz baths, adjusting diet, improving bowel habits, topical medications for symptom relief, and surgical intervention when necessary. The appropriate approach should be selected based on the severity of the condition; most mild cases can be relieved with conservative treatment. If pain persists or worsens, bleeding becomes frequent, or signs of infection appear, prompt medical attention is recommended.